Shrubs, scandent. Bark pale yellow. Stems puberulent when young, glabrescent, sparsely scattered with minute lenticels, basally brown and peeled off. Leaves 3-foliolate; rachis 15-25 cm, including petiole 4-6 cm; stipels ca. 2 mm; leaflet blades elliptic-lanceolate, lateral ones 9-12 × 3.5-5 cm, terminal one 11-18 × 6-9 cm, papery, abaxially straw-green with prominent veins, adaxially dark green and flat. Panicle terminal 12-15 cm; flowering branchlets spreading, puberulent. Flowers ca. 1.5 cm. Corolla red to purple; standard oblong, without basal calluses, outside densely sericeous. Ovary sericeous, with 6-8 ovules. Legume globose, 5-6.5 × ca. 3 cm, leathery, brown tomentose, apex beaked; suture evident. Seeds 1 or 2 per legume, dark brown, broadly ovoid. Fl. Jun-Aug, fr. Oct-Nov.
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